Any street, avenue, boulevard, road, parkway, viaduct, drive or other way which is an existing state, county or municipal roadway or which is shown upon a plat heretofore approved pursuant to law or which is approved by official action as provided by this Part
4 or which is shown on a plat duly filed and recorded in the office of the county recording officer prior to the appointment of a municipal agency and the grant to such board of the power to review plats, and includes the land between the street lines, whether improved or unimproved, and may comprise pavement, shoulders, gutters, curbs, sidewalks, parking areas and other areas within the street lines.